package com.xy.webadmin.app.service.impl;

import cn.hutool.core.collection.CollUtil;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.xy.webadmin.app.service.*;
import com.xy.webadmin.app.dao.*;
import com.xy.webadmin.app.model.*;
import com.xy.common.core.base.dao.BaseDaoMapper;
import com.xy.common.core.object.TokenData;
import com.xy.common.core.object.MyRelationParam;
import com.xy.common.core.object.CallResult;
import com.xy.common.core.base.service.BaseService;
import com.xy.common.sequence.wrapper.IdGeneratorWrapper;
import com.github.pagehelper.Page;
import lombok.extern.slf4j.Slf4j;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.*;

/**
 * 学生班级数据操作服务类。
 *
 * @author xiaoyue
 * @date 2025-05-13
 */
@Slf4j
@Service("studentClazzService")
public class StudentClazzServiceImpl extends BaseService<StudentClazz, Long> implements StudentClazzService {

    @Autowired
    private IdGeneratorWrapper idGenerator;
    @Autowired
    private StudentClazzMapper studentClazzMapper;
    @Autowired
    private StudentService studentService;
    @Autowired
    private ClazzService clazzService;

    /**
     * 返回当前Service的主表Mapper对象。
     *
     * @return 主表Mapper对象。
     */
    @Override
    protected BaseDaoMapper<StudentClazz> mapper() {
        return studentClazzMapper;
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public StudentClazz saveNew(StudentClazz studentClazz) {
        studentClazzMapper.insert(this.buildDefaultValue(studentClazz));
        return studentClazz;
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void saveNewBatch(List<StudentClazz> studentClazzList) {
        if (CollUtil.isNotEmpty(studentClazzList)) {
            studentClazzList.forEach(this::buildDefaultValue);
            studentClazzMapper.insertList(studentClazzList);
        }
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public boolean update(StudentClazz studentClazz, StudentClazz originalStudentClazz) {
        studentClazz.setCreateUserId(originalStudentClazz.getCreateUserId());
        studentClazz.setUpdateUserId(TokenData.takeFromRequest().getUserId());
        studentClazz.setCreateTime(originalStudentClazz.getCreateTime());
        studentClazz.setUpdateTime(new Date());
        // 这里重点提示，在执行主表数据更新之前，如果有哪些字段不支持修改操作，请用原有数据对象字段替换当前数据字段。
        UpdateWrapper<StudentClazz> uw = this.createUpdateQueryForNullValue(studentClazz, studentClazz.getId());
        return studentClazzMapper.update(studentClazz, uw) == 1;
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public boolean remove(Long id) {
        return studentClazzMapper.deleteById(id) == 1;
    }

    @Override
    public List<StudentClazz> getStudentClazzList(StudentClazz filter, String orderBy) {
        return studentClazzMapper.getStudentClazzList(filter, orderBy);
    }

    @Override
    public List<StudentClazz> getStudentClazzListWithRelation(StudentClazz filter, String orderBy) {
        List<StudentClazz> resultList = studentClazzMapper.getStudentClazzList(filter, orderBy);
        // 在缺省生成的代码中，如果查询结果resultList不是Page对象，说明没有分页，那么就很可能是数据导出接口调用了当前方法。
        // 为了避免一次性的大量数据关联，规避因此而造成的系统运行性能冲击，这里手动进行了分批次读取，开发者可按需修改该值。
        int batchSize = resultList instanceof Page ? 0 : 1000;
        this.buildRelationForDataList(resultList, MyRelationParam.normal(), batchSize);
        return resultList;
    }

    @Override
    public CallResult verifyRelatedData(StudentClazz studentClazz, StudentClazz originalStudentClazz) {
        String errorMessageFormat = "数据验证失败，关联的%s并不存在，请刷新后重试！";
        //这里是基于字典的验证。
        if (this.needToVerify(studentClazz, originalStudentClazz, StudentClazz::getStudentId)
                && !studentService.existId(studentClazz.getStudentId())) {
            return CallResult.error(String.format(errorMessageFormat, "学生"));
        }
        //这里是基于字典的验证。
        if (this.needToVerify(studentClazz, originalStudentClazz, StudentClazz::getClazzId)
                && !clazzService.existId(studentClazz.getClazzId())) {
            return CallResult.error(String.format(errorMessageFormat, "班级"));
        }
        return CallResult.ok();
    }

    private StudentClazz buildDefaultValue(StudentClazz studentClazz) {
        if (studentClazz.getId() == null) {
            studentClazz.setId(idGenerator.nextLongId());
        }
        TokenData tokenData = TokenData.takeFromRequest();
        studentClazz.setCreateUserId(tokenData.getUserId());
        studentClazz.setUpdateUserId(tokenData.getUserId());
        Date now = new Date();
        studentClazz.setCreateTime(now);
        studentClazz.setUpdateTime(now);
        return studentClazz;
    }
}
